Improve performance of ConcurrentReferenceHashMap creation

spring-core/src/main/java/org/springframework/util/ConcurrentReferenceHashMap.java

@@ -179,10 +179,13 @@ public class ConcurrentReferenceHashMap<K, V> extends AbstractMap<K, V> implemen
 		int size = 1 << this.shift;
 		this.referenceType = referenceType;
 		int roundedUpSegmentCapacity = (int) ((initialCapacity + size - 1L) / size);
-		this.segments = (Segment[]) Array.newInstance(Segment.class, size);
+		int initialSize = 1 << calculateShift(roundedUpSegmentCapacity, MAXIMUM_SEGMENT_SIZE);
-		for (int i = 0; i < this.segments.length; i++) {
+		Segment[] segments = (Segment[]) Array.newInstance(Segment.class, size);
-			this.segments[i] = new Segment(roundedUpSegmentCapacity);
+		int resizeThreshold = (int) (initialSize * getLoadFactor());
+		for (int i = 0; i < segments.length; i++) {
+			segments[i] = new Segment(initialSize, resizeThreshold);
 		}
+		this.segments = segments;
 	}
 
 
@@ -481,11 +484,11 @@ public class ConcurrentReferenceHashMap<K, V> extends AbstractMap<K, V> implemen
 		 */
 		private int resizeThreshold;
 
-		public Segment(int initialCapacity) {
+		public Segment(int initialSize, int resizeThreshold) {
 			this.referenceManager = createReferenceManager();
-			this.initialSize = 1 << calculateShift(initialCapacity, MAXIMUM_SEGMENT_SIZE);
+			this.initialSize = initialSize;
-			this.references = createReferenceArray(this.initialSize);
+			this.references = createReferenceArray(initialSize);
-			this.resizeThreshold = (int) (this.references.length * getLoadFactor());
+			this.resizeThreshold = resizeThreshold;
 		}
 
 		@Nullable